OpenStax Biology 2e Instructor Answer Guide
Biology 2e
Unit 7: Animal Structure and Function
Chapter 33: The Animal Body: Basic Form and Function
Visual Connection Questions
1. Which of the following statements about types of epithelial cells is false?
a. Simple columnar epithelial cells line the tissue of the lung.
2. State whether each of the following processes are regulated by a positive feedback loop or a
negative feedback loop.
Both processes are the result of negative feedback loops. Negative feedback loops, which tend
to keep a system at equilibrium, are more common than positive feedback loops.
, OpenStax Biology 2e Instructor Answer Guide
3. When bacteria are destroyed by leuckocytes, pyrogens are released into the blood. Pyrogens
reset the body’s thermostat to a higher temperature, resulting in fever. How might pyrogens
cause the body temperature to rise?
Pyrogens increase body temperature by causing the blood vessels to constrict, inducing
shivering, and stopping sweat glands from secreting fluid.
Review Questions
4. Which type of animal maintains a constant internal body temperature?
a. endotherm
5. The symmetry found in animals that move swiftly is ________.
b. bilateral
6. What term describes the condition of a desert mouse that lowers its metabolic rate and
“sleeps” during the hot day?
c. estivation
7. A plane that divides an animal into equal right and left portions is ________.
b. midsagittal
8. A plane that divides an animal into dorsal and ventral portions is ________.
d. transverse
9. The pleural cavity is a part of which cavity?
b. thoracic cavity
10. How could the increasing global temperature associated with climate change impact
ectotherms?
d. Ectotherms will be able to expand into new habitats.
Biology 2e
Unit 7: Animal Structure and Function
Chapter 33: The Animal Body: Basic Form and Function
Visual Connection Questions
1. Which of the following statements about types of epithelial cells is false?
a. Simple columnar epithelial cells line the tissue of the lung.
2. State whether each of the following processes are regulated by a positive feedback loop or a
negative feedback loop.
Both processes are the result of negative feedback loops. Negative feedback loops, which tend
to keep a system at equilibrium, are more common than positive feedback loops.
, OpenStax Biology 2e Instructor Answer Guide
3. When bacteria are destroyed by leuckocytes, pyrogens are released into the blood. Pyrogens
reset the body’s thermostat to a higher temperature, resulting in fever. How might pyrogens
cause the body temperature to rise?
Pyrogens increase body temperature by causing the blood vessels to constrict, inducing
shivering, and stopping sweat glands from secreting fluid.
Review Questions
4. Which type of animal maintains a constant internal body temperature?
a. endotherm
5. The symmetry found in animals that move swiftly is ________.
b. bilateral
6. What term describes the condition of a desert mouse that lowers its metabolic rate and
“sleeps” during the hot day?
c. estivation
7. A plane that divides an animal into equal right and left portions is ________.
b. midsagittal
8. A plane that divides an animal into dorsal and ventral portions is ________.
d. transverse
9. The pleural cavity is a part of which cavity?
b. thoracic cavity
10. How could the increasing global temperature associated with climate change impact
ectotherms?
d. Ectotherms will be able to expand into new habitats.
